RU204321U1 - IMMUNITY SATELLITE NAVIGATION EQUIPMENT - Google Patents

Abstract

The utility model relates to navigation aids using global navigation satellite systems (GNSS) and can be used in anti-jamming navigation equipment for GNSS consumers. The technical result is to increase the reliability and resistance of satellite navigation equipment (ASN) with increased noise immunity to external influencing factors at high temperatures. This result is achieved due to the fact that the device is made in the form of a monoblock, and on the rear edge of the metal base of the body there is a radiator with a developed surface, as well as two fittings that provide connection of the device to the on-board cooling system of the carrier object and supply the cooling mixture to the inner cavity of the rear the edges of the metal base of the device body and its spraying through the holes onto the fins of the radiator, providing efficient heat removal from the component parts of the device located inside the body into the surrounding space. 4 ill.

Description

The utility model relates to the field of radio engineering, and, in particular, radio navigation using global navigation satellite systems (GNSS).

The proposed utility model can be used in anti-jamming navigation equipment for GNSS consumers.

A distinctive feature of satellite navigation equipment (ASN) with increased noise immunity based on an antenna array is the need to include at least M radio receiving paths with an increased dynamic range in its composition, where M is the number of elements of the antenna system, as well as additional computing nodes in which multichannel processing of received signals. This leads to an increase in power consumption and, as a consequence, heat generation in the ANS with increased noise immunity compared to standard navigation equipment and requires design solutions that ensure effective heat dissipation into the surrounding space.

As a prototype, the "Small-sized adaptive antenna array" (MAAP) according to patent RU 124517 [1] is selected, containing a sealed housing consisting of a metal base, the side edges of which are made in the form of radiators, and a radio-transparent cover, in which boards with electronic components are placed, which include antenna elements, analog and digital parts, connectors for external interfaces.

A significant disadvantage of the prototype is the limited range of its operating temperatures (up to + 60 ° C according to the technical characteristics of the prototype), due to the exclusively passive cooling of the MAAP. At the same time, an urgent technical problem is the placement of an ASN with increased noise immunity on highly dynamic carrier objects, for example, unmanned aerial vehicles (UAVs), moving at speeds exceeding the speed of sound, as a result of which the surface of the UAV body can heat up to temperatures of about 700 ° C.

The task solved by the utility model is the development of an ASN with increased noise immunity, reliable and resistant to external influences under conditions of high temperatures.

The technical result of the claimed utility model is to increase the reliability and resistance of the ASN with increased noise immunity to external influencing factors in conditions of high temperatures.

The technical result of the claimed utility model is achieved due to the fact that the device is made in the form of a monoblock, and a radiator with a developed surface is installed on the rear edge of the metal base of the case, as well as two fittings that provide connection of the device to the on-board cooling system of the carrier object and supply the cooling mixture to the inner cavity of the rear edge of the metal base of the device body and its spraying through the holes onto the fins of the radiator, providing efficient heat removal from the component parts of the device located inside the body into the surrounding space.

The essence of the utility model is illustrated by drawings, which show:

in fig. 1 - General view of the ASN case with increased noise immunity from the front;

in fig. 2 - General view of the metal base of the ASN case with increased noise immunity;

in fig. 3 - internal structure of ASN with increased noise immunity;

in fig. 4 is a general view of the ASN case with increased noise immunity from the rear.

ASN with increased noise immunity consists of the following components:

a sealed housing including a metal base 1, the side faces of which are made in the form of radiators 2, and a radio-transparent cover 3;

metal combs 4, providing electrical contact between the ASN case of increased noise immunity and the case of the carrier object;

connectors for external interfaces 5;

an analog node 6, which includes an antenna system 7, a low-noise amplifier 8, an analog module 9, a radiator of an analog node 10;

a harness of intermodular connections 11;

digital node 12, including digital module 13, module of secondary power supplies 14, radiator of digital node 15;

adapter 16 for transmitting signals from an analog node to a digital node);

the radiator of the rear edge of the metal case of the ASN with increased noise immunity 17, the fittings 18 through which the cooling mixture from the cooling system of the carrier object enters the ASN with increased noise immunity, which is sprayed through the holes 19 onto the fins of the radiator 17.

ASN of increased noise immunity is structurally a monoblock (Fig. 1). The main supporting structure is the metal base of the body 1, which is made in the form of one integral part to ensure rigidity (Fig. 2). The design of the device body provides the required thermal regime of the electronic component base of the internal components of the ASN with increased noise immunity at high ambient temperatures. For this purpose, the thickened walls of the metal base of the case and radiators 2 with horizontal shelves on its lateral edges are intended.

The cover 3 of the antenna system is made of fluoroplastic-4, which has high chemical and thermal resistance, as well as good radio transparency. The radio-transparent cover covers the upper surface of the case to reduce its heating.

To eliminate edge effects and minimize distortion of the directional pattern of the antenna system elements of the ASN with increased noise immunity due to the inhomogeneity of the structure, a reliable electrical contact is required between the underlying surface of the antenna elements (the upper plane of the ASN case with increased noise immunity) and the metal body of the carrier object. This is achieved by using metal combs 4, fixed along the perimeter of the upper part of the base of the body 1 of the device, the coating of which in this place is selected conductive, and on the other side pressed against the metal edging of the opening of the body of the carrier object (Fig. 1).

On the front edge of the metal base of the device body there are HF and LF connectors of external interfaces 5, which serve for communication with devices of the carrier object (Fig. 1).

Inside the body there is an analog unit 6, consisting of an antenna system 7, a low-noise amplifier 8, an analog module 9 and a radiator of an analog unit 10; a harness of intermodular connections 11; digital node 12, consisting of a digital module 13, a module of secondary power supplies 14 and a heat sink of the digital node 15; adapter 16, providing signal transmission from the analog node to the digital node (Fig. 3). Radiators 10 and 15, which are respectively included in the analog unit and the digital unit, provide heat removal from the internal elements of the ASN with increased noise immunity to the metal base of the housing 1.

On the rear edge of the metal base of the housing 1, a radiator 17 with a developed surface is installed, as well as two fittings 18, with the help of which the ASN of increased noise immunity is connected to the on-board cooling system of the carrier object (Fig. 4).

Through the fittings 18, the cooling mixture is fed into the inner cavity of the rear edge of the metal base of the housing 1 of the device, and then through the holes 19 it is sprayed onto the fins of the radiator 17. Effective cooling of the rear wall and good heat transfer of the thickened side walls of the metal base of the housing allow for efficient heat removal from the components of the ASN increased noise immunity, placed inside the case, into the surrounding space.

The removal of heat from the radiator 17, attached to the rear edge of the metal base of the device body, entails the need to keep the side walls of the monoblock thick enough to dissipate heat to the rear wall. To reduce the mass, additional milling and drilling of the metal volume is used, which do not impair the efficiency of the cooling system and maintain sufficient strength of the body.

The metal parts of the case are made of aluminum alloy, which ensures that the case is lightweight and has good thermal conductivity. A black anodic oxide coating is applied to the body parts, which protects it from dew, frost, static dust, and increases the reliability of the device as a whole.

The proposed utility model ensures the performance and reliability of the ASN with increased noise immunity under the influence of high ambient temperatures and external factors (dew, frost, static dust), and can be used, in particular, on highly dynamic UAVs moving at supersonic speeds.

The applicant enterprise has developed and manufactured experimental samples of the proposed utility model. The conducted experimental studies have confirmed the achievement of the claimed technical result.

The industrial applicability of the utility model is determined by the fact that the proposed device can be manufactured on the basis of the above description and drawings.

Information sources

1. Small-sized adaptive antenna array: US Pat. 124517 Rus. Federation: IPC H01Q 23/00 / Kharisov V.N., Efimenko B.C., Pastukhov A.V., Golovin P.M., Pavlov B.C .; applicant and patentee Open Joint Stock Company VNIIR-Progress. - No. 2012133898/08; declared 07.08.2012; publ. 01/27/2013, Bul. Number 3.

Claims (1)

Satellite navigation equipment with increased noise immunity, containing a sealed case consisting of a metal base, the lateral edges of which are made in the form of radiators, and a radio-transparent cover, which contains boards with electronic components, which include antenna elements, analog and digital parts, connectors for external interfaces characterized in that the device is made in the form of a monoblock, and a radiator with a developed surface is installed on the rear edge of the metal base of the case, as well as two fittings that provide connection of the device to the on-board cooling system of the carrier object and supply the cooling mixture to the inner cavity of the rear edge of the metal base the body of the device and its spraying through the holes on the fins of the radiator, providing efficient heat removal from the component parts of the device, placed inside the body, into the surrounding space.

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